/**
 * Copyright 2010-2016 the original author or authors.
 * 
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.uorm.utils;

import java.io.Serializable;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 *
 * @author <a href="mailto:xunchangguo@gmail.com">郭训长</a>
 * @version 1.0.0
 * ＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝<br/>
 * 修订日期                 修订人            描述<br/>
 * 2013-9-11       郭训长            创建<br/>
 */
public class LRUMap<K, V> extends LinkedHashMap<K, V> implements Serializable {
	/**
	 * 
	 */
	private static final long serialVersionUID = 9086475439025562928L;

	private final int maxEntries;

	public LRUMap(int maxEntries) {
		super( maxEntries, .75f, true );
		this.maxEntries = maxEntries;
	}

	protected boolean removeEldestEntry(Map.Entry<K, V> eldest) {
		return ( size() > maxEntries );
	}
}
